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Sun, 12 Nov 2023 05:08:09 -0800 (PST) Received: from [192.168.1.4] ([117.243.91.115]) by smtp.gmail.com with ESMTPSA id ix9-20020a170902f80900b001c74876f018sm2580571plb.18.2023.11.12.05.08.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 12 Nov 2023 05:08:07 -0800 (PST) Content-Type: multipart/mixed; boundary="------------bkfPW3idvi5GL50KfXYs2VQC" Message-ID: <10dd4562-81bf-48c7-b2a2-42ea51ba8843@gmail.com> Date: Sun, 12 Nov 2023 18:38:00 +0530 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [btrfs?] memory leak in btrfs_ref_tree_mod Content-Language: en-US To: syzbot , clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <000000000000f5ce160602f29dd6@google.com> From: Bragatheswaran Manickavel In-Reply-To: <000000000000f5ce160602f29dd6@google.com> This is a multi-part message in MIME format. --------------bkfPW3idvi5GL50KfXYs2VQC Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 25aa0bebba72b318e71fe205bfd1236550cc9534 On 15/08/23 14:45, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 25aa0bebba72 Merge tag 'net-6.5-rc6' of git://git.kernel.o.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=169577fda80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=2bf8962e4f7984f4 > dashboard link: https://syzkaller.appspot.com/bug?extid=d66de4cbf532749df35f > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148191c3a80000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/76b0857d2814/disk-25aa0beb.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/a01574755257/vmlinux-25aa0beb.xz > kernel image: https://storage.googleapis.com/syzbot-assets/262002db770e/bzImage-25aa0beb.xz > mounted in repro: https://storage.googleapis.com/syzbot-assets/b93cffaa6717/mount_0.gz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+d66de4cbf532749df35f@syzkaller.appspotmail.com > > BUG: memory leak > unreferenced object 0xffff888129851240 (size 64): > comm "syz-executor.0", pid 5069, jiffies 4294977377 (age 16.480s) > hex dump (first 32 bytes): > 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > backtrace: > [] kmalloc_trace+0x25/0x90 mm/slab_common.c:1076 > [] kmalloc include/linux/slab.h:582 [inline] > [] btrfs_ref_tree_mod+0x211/0xb80 fs/btrfs/ref-verify.c:768 > [] btrfs_free_tree_block+0x116/0x450 fs/btrfs/extent-tree.c:3250 > [] __btrfs_cow_block+0x6a5/0xa30 fs/btrfs/ctree.c:601 > [] btrfs_cow_block+0x154/0x2b0 fs/btrfs/ctree.c:712 > [] commit_cowonly_roots+0x8c/0x3f0 fs/btrfs/transaction.c:1276 > [] btrfs_commit_transaction+0x999/0x15c0 fs/btrfs/transaction.c:2410 > [] btrfs_commit_super+0x86/0xb0 fs/btrfs/disk-io.c:4195 > [] close_ctree+0x543/0x730 fs/btrfs/disk-io.c:4349 > [] generic_shutdown_super+0x9e/0x1c0 fs/super.c:499 > [] kill_anon_super+0x19/0x30 fs/super.c:1110 > [] btrfs_kill_super+0x1d/0x30 fs/btrfs/super.c:2138 > [] deactivate_locked_super+0x46/0xd0 fs/super.c:330 > [] deactivate_super fs/super.c:361 [inline] > [] deactivate_super+0x9c/0xb0 fs/super.c:357 > [] cleanup_mnt+0x121/0x210 fs/namespace.c:1254 > [] task_work_run+0x8f/0xe0 kernel/task_work.c:179 > > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the bug is already fixed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > If you want to change bug's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the bug is a duplicate of another bug, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup > --------------bkfPW3idvi5GL50KfXYs2VQC Content-Type: text/x-patch; charset=UTF-8; name="btrfs.diff" Content-Disposition: attachment; filename="btrfs.diff" Content-Transfer-Encoding: base64 ZGlmZiAtLWdpdCBhL2ZzL2J0cmZzL3JlZi12ZXJpZnkuYyBiL2ZzL2J0cmZzL3JlZi12ZXJp ZnkuYwppbmRleCA5NWQyODQ5N2RlN2MuLjUwYjU5YjNkYzQ3NCAxMDA2NDQKLS0tIGEvZnMv YnRyZnMvcmVmLXZlcmlmeS5jCisrKyBiL2ZzL2J0cmZzL3JlZi12ZXJpZnkuYwpAQCAtNzkx LDYgKzc5MSw3IEBAIGludCBidHJmc19yZWZfdHJlZV9tb2Qoc3RydWN0IGJ0cmZzX2ZzX2lu Zm8gKmZzX2luZm8sCiAJCQlkdW1wX3JlZl9hY3Rpb24oZnNfaW5mbywgcmEpOwogCQkJa2Zy ZWUocmVmKTsKIAkJCWtmcmVlKHJhKTsKKwkJCWtmcmVlKHJlKTsKIAkJCWdvdG8gb3V0X3Vu bG9jazsKIAkJfSBlbHNlIGlmIChiZS0+bnVtX3JlZnMgPT0gMCkgewogCQkJYnRyZnNfZXJy KGZzX2luZm8sCkBAIC04MDAsNiArODAxLDcgQEAgaW50IGJ0cmZzX3JlZl90cmVlX21vZChz dHJ1Y3QgYnRyZnNfZnNfaW5mbyAqZnNfaW5mbywKIAkJCWR1bXBfcmVmX2FjdGlvbihmc19p bmZvLCByYSk7CiAJCQlrZnJlZShyZWYpOwogCQkJa2ZyZWUocmEpOworCQkJa2ZyZWUocmUp OwogCQkJZ290byBvdXRfdW5sb2NrOwogCQl9CiAKQEAgLTgyMiw2ICs4MjQsNyBAQCBpbnQg YnRyZnNfcmVmX3RyZWVfbW9kKHN0cnVjdCBidHJmc19mc19pbmZvICpmc19pbmZvLAogCQkJ CWR1bXBfcmVmX2FjdGlvbihmc19pbmZvLCByYSk7CiAJCQkJa2ZyZWUocmVmKTsKIAkJCQlr ZnJlZShyYSk7CisJCQkJa2ZyZWUocmUpOwogCQkJCWdvdG8gb3V0X3VubG9jazsKIAkJCX0K IAkJCWV4aXN0LT5udW1fcmVmcy0tOwpAQCAtODM4LDYgKzg0MSw3IEBAIGludCBidHJmc19y ZWZfdHJlZV9tb2Qoc3RydWN0IGJ0cmZzX2ZzX2luZm8gKmZzX2luZm8sCiAJCQlkdW1wX3Jl Zl9hY3Rpb24oZnNfaW5mbywgcmEpOwogCQkJa2ZyZWUocmVmKTsKIAkJCWtmcmVlKHJhKTsK KwkJCWtmcmVlKHJlKTsKIAkJCWdvdG8gb3V0X3VubG9jazsKIAkJfQogCQlrZnJlZShyZWYp OwpAQCAtODQ5LDYgKzg1Myw3IEBAIGludCBidHJmc19yZWZfdHJlZV9tb2Qoc3RydWN0IGJ0 cmZzX2ZzX2luZm8gKmZzX2luZm8sCiAJCQlkdW1wX3JlZl9hY3Rpb24oZnNfaW5mbywgcmEp OwogCQkJa2ZyZWUocmVmKTsKIAkJCWtmcmVlKHJhKTsKKwkJCWtmcmVlKHJlKTsKIAkJCWdv dG8gb3V0X3VubG9jazsKIAkJfQogCX0K --------------bkfPW3idvi5GL50KfXYs2VQC--